Control File: invalid character for a field name

Field names (and as a side effect variasble names) must be composed of only the following characters:

  • A-Z — upper case letters
  • a-z — lower case letters
  • 0-9 — digits
  • _ — underscore
  • + — plus character (forbidden as the first character)
  • - — minus or dash character (forbidden as the first character)
  • . — period (forbidden as the first character)

The field can also include a slash (/) character, in which case there is a Sub-Package name included. The same restrictions apply to the Sub-Package name as to the Field name. No more than one slash (/) character can be included or an error is generated.

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